CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 313 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) blue (c) black (d) red
2. 2.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 99 (c) 1000 (d) 100
3. 3.🌈 Which colour is #ff00ff? (a) cyan (b) magenta (c) blue (d) red
4. 4.🌈 Which colour of light is strongest in rgb(160, 105, 90)? (a) green (b) blue (c) red
5. 5.🌈 Which colour is #0000ff? (a) yellow (b) blue (c) red (d) white
6. 6.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
7. 7.🌈 Which colour is #000000? (a) red (b) white (c) magenta (d) black
8. 8.🌈 Which colour of light is strongest in rgb(12, 110, 158)? (a) red (b) blue (c) green
9. 9.🌈 Which hex code is black? (a) #ff0000 (b) #000000 (c) #0000ff (d) #00ff00
10. 10.🌈 Which colour is #ffff00? (a) white (b) yellow (c) magenta (d) blue
11. 11.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) J (c) F (d) G
12. 12.🌈 In #0000eb the blue part is the hex number eb. What is it as a normal number?
13. 13.🌈 Which colour is #00ff00? (a) bright green (b) white (c) cyan (d) red
14. 14.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) blue (c) white (d) red
15. 15.🌈 Which colour is #00ffff? (a) red (b) magenta (c) cyan (d) bright green
16. 16.🌈 In #000a00 the green part is the hex number 0a. What is it as a normal number?
17. 17.🌈 Which hex code is magenta? (a) #ff00ff (b) #000000 (c) #00ff00 (d) #ff0000
18. 18.🌈 Which colour of light is strongest in rgb(13, 234, 115)? (a) blue (b) red (c) green
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) red (c) black (d) white
20. 20.🌈 Which colour is rgb(255, 0, 0)? (a) yellow (b) bright green (c) red (d) magenta
21. 21.🌈 Which colour of light is strongest in rgb(253, 46, 26)? (a) green (b) red (c) blue
22. 22.🌈 Which colour is #ff0000? (a) red (b) white (c) cyan (d) magenta
23. 23.🌈 Which hex code is white? (a) #0000ff (b) #ffffff (c) #000000 (d) #00ff00
24. 24.🌈 Which colour of light is strongest in rgb(253, 121, 89)? (a) red (b) blue (c) green
25. 25.🌈 In #4c0000 the red part is the hex number 4c. What is it as a normal number?
26. 26.🌈 Which colour of light is strongest in rgb(223, 113, 28)? (a) red (b) blue (c) green
27. 27.🌈 Which hex code is bright green? (a) #00ff00 (b) #0000ff (c) #000000 (d) #ffffff
28. 28.🌈 In #00bc00 the green part is the hex number bc. What is it as a normal number?
29. 29.🌈 In #5b0000 the red part is the hex number 5b. What is it as a normal number?
30. 30.🌈 Which colour is rgb(255, 255, 0)? (a) cyan (b) bright green (c) white (d) yellow
31. 31.🌈 Which colour of light is strongest in rgb(245, 18, 46)? (a) green (b) red (c) blue
32. 32.🌈 Which colour of light is strongest in rgb(109, 168, 137)? (a) red (b) blue (c) green
33. 33.🌈 Which colour of light is strongest in rgb(156, 53, 84)? (a) green (b) red (c) blue
34. 34.🌈 Which colour is rgb(0, 0, 255)? (a) white (b) blue (c) magenta (d) red
35. 35.🌈 Which colour of light is strongest in rgb(203, 102, 54)? (a) blue (b) green (c) red
36. 36.🌈 In #ba0000 the red part is the hex number ba. What is it as a normal number?
37. 37.🌈 Which colour of light is strongest in rgb(40, 11, 198)? (a) red (b) green (c) blue
38. 38.🌈 Which colour of light is strongest in rgb(112, 103, 247)? (a) blue (b) green (c) red
39. 39.🌈 Which colour of light is strongest in rgb(178, 15, 132)? (a) green (b) red (c) blue
40. 40.🌈 In #ad0000 the red part is the hex number ad. What is it as a normal number?

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